web_site.ml 46.7 KB
Newer Older
Stephane Glondu's avatar
Stephane Glondu committed
1 2 3
(**************************************************************************)
(*                                BELENIOS                                *)
(*                                                                        *)
Stephane Glondu's avatar
Stephane Glondu committed
4
(*  Copyright © 2012-2014 Inria                                           *)
Stephane Glondu's avatar
Stephane Glondu committed
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
(*                                                                        *)
(*  This program is free software: you can redistribute it and/or modify  *)
(*  it under the terms of the GNU Affero General Public License as        *)
(*  published by the Free Software Foundation, either version 3 of the    *)
(*  License, or (at your option) any later version, with the additional   *)
(*  exemption that compiling, linking, and/or using OpenSSL is allowed.   *)
(*                                                                        *)
(*  This program is distributed in the hope that it will be useful, but   *)
(*  WITHOUT ANY WARRANTY; without even the implied warranty of            *)
(*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *)
(*  Affero General Public License for more details.                       *)
(*                                                                        *)
(*  You should have received a copy of the GNU Affero General Public      *)
(*  License along with this program.  If not, see                         *)
(*  <http://www.gnu.org/licenses/>.                                       *)
(**************************************************************************)

22
open Lwt
23
open Platform
24
open Serializable_j
25
open Signatures
26
open Common
Stephane Glondu's avatar
Stephane Glondu committed
27
open Web_serializable_j
28
open Web_common
29
open Web_signatures
30
open Web_services
Stephane Glondu's avatar
Stephane Glondu committed
31

32 33
let source_file = ref "belenios.tar.gz"
let spool_dir = ref "."
Stephane Glondu's avatar
Stephane Glondu committed
34

35 36 37 38 39 40 41 42 43 44 45 46
let get_single_line x =
  match_lwt Lwt_stream.get x with
  | None -> return None
  | Some _ as line ->
    lwt b = Lwt_stream.is_empty x in
    if b then (
      return line
    ) else (
      Lwt_stream.junk_while (fun _ -> true) x >>
      return None
    )

47 48
let ( / ) = Filename.concat

49 50 51 52 53 54 55 56
let delete_shallow_directory dir =
  lwt () =
    Lwt_unix.files_of_directory dir |>
    Lwt_stream.filter (fun x -> x <> "." && x <> "..") |>
    Lwt_stream.iter_s (fun x -> Lwt_unix.unlink (dir/x))
  in
  Lwt_unix.rmdir dir

Stephane Glondu's avatar
Stephane Glondu committed
57
module PString = String
Stephane Glondu's avatar
Stephane Glondu committed
58

Stephane Glondu's avatar
Stephane Glondu committed
59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92
open Eliom_service
open Eliom_registration

module LwtRandom = MakeLwtRandom (struct let rng = make_rng () end)

(* Persistent table, used to initialize the server. *)
let election_ptable = Ocsipersist.open_table "site_elections"

(* Table with elections in setup mode. *)
let election_stable = Ocsipersist.open_table "site_setup"

(* Table with tokens given to trustees. *)
let election_pktokens = Ocsipersist.open_table "site_pktokens"

(* Table with tokens given to credential authorities. *)
let election_credtokens = Ocsipersist.open_table "site_credtokens"

(* In-memory table, indexed by UUID, contains closures. *)
let election_table = ref SMap.empty

module T = Web_templates

let register_election params web_params =
  let module P = (val params : ELECTION_PARAMS) in
  let uuid = Uuidm.to_string P.params.e_uuid in
  let module D = struct
    module G = P.G
    let election = {
      e_params = P.params;
      e_pks = None;
      e_fingerprint = P.fingerprint;
    }
  end in
  let module P = (val web_params : WEB_PARAMS) in
93
  let module W = Web_election.Make (D) (P) (LwtRandom) in
94 95
  let election = (module W : WEB_ELECTION) in
  fun () ->
Stephane Glondu's avatar
Stephane Glondu committed
96 97 98 99 100 101 102
    (* starting from here, we do side-effects on the running server *)
    election_table := SMap.add uuid election !election_table;
    election

(* Mutex to avoid simultaneous registrations of the same election *)
let registration_mutex = Lwt_mutex.create ()

103
let import_election f =
Stephane Glondu's avatar
Stephane Glondu committed
104 105 106 107 108 109 110 111 112
  Lwt_mutex.lock registration_mutex >>
  try_lwt
    lwt raw_election =
      Lwt_io.lines_of_file f.f_election |>
      get_single_line >>=
      (function
      | Some e -> return e
      | None -> Printf.ksprintf
        failwith "election.json must contain a single line"
113
      )
Stephane Glondu's avatar
Stephane Glondu committed
114 115
    in
    let params = Group.election_params_of_string raw_election in
116 117
    let module P = (val params : ELECTION_PARAMS) in
    let uuid = Uuidm.to_string P.params.e_uuid in
Stephane Glondu's avatar
Stephane Glondu committed
118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136
    lwt exists =
      try_lwt
        lwt _ = Ocsipersist.find election_ptable uuid in
        return true
      with Not_found -> return false
    in
    if exists then (
      Lwt_mutex.unlock registration_mutex;
      return None
    ) else (
      let dir = !spool_dir/uuid in
      lwt metadata =
        Lwt_io.chars_of_file f.f_metadata |>
        Lwt_stream.to_string >>=
        wrap1 metadata_of_string
      in
      let module X = struct
        let metadata = metadata
        let dir = dir
137
      end in
Stephane Glondu's avatar
Stephane Glondu committed
138
      let web_params = (module X : WEB_PARAMS) in
139
      let do_register = register_election params web_params in
140
      let module G = P.G in
Stephane Glondu's avatar
Stephane Glondu committed
141 142
      let module KG = Election.MakeSimpleDistKeyGen (G) (LwtRandom) in
      let public_keys = Lwt_io.lines_of_file f.f_public_keys in
Stephane Glondu's avatar
Stephane Glondu committed
143
      let voters = Lwt_io.lines_of_file f.f_voters in
144 145 146 147 148
      lwt () =
        match_lwt Lwt_stream.peek voters with
        | Some _ -> return_unit
        | None -> Lwt.fail (Failure "No voters")
      in
149 150 151 152 153 154 155 156 157 158 159 160
      lwt () =
        match metadata.e_auth_config with
        | Some [x] ->
           if x.auth_system = "password" then
             let table = "password_" ^ underscorize uuid in
             let table = Ocsipersist.open_table table in
             lwt n = Ocsipersist.length table in
             if n = 0 then Lwt.fail (Failure "No passwords")
             else return_unit
           else return_unit
        | _ -> return_unit
      in
Stephane Glondu's avatar
Stephane Glondu committed
161 162 163 164 165 166 167
      lwt pks = Lwt_stream.(
        clone public_keys |>
        map (trustee_public_key_of_string G.read) |>
        to_list >>= wrap1 Array.of_list
      ) in
      if not (Array.forall KG.check pks) then
        failwith "Public keys are invalid.";
168
      if not G.(P.params.e_public_key =~ KG.combine pks) then
Stephane Glondu's avatar
Stephane Glondu committed
169 170 171 172 173 174 175 176
        failwith "Public keys mismatch with election public key.";
      let public_creds = Lwt_io.lines_of_file f.f_public_creds in
      lwt () = Lwt_stream.(
        clone public_creds |>
        iter_s (fun x ->
          if not G.(check @@ of_string x) then (
            Lwt.fail @@ Failure "Public credentials are invalid."
          ) else return ()
177
        )
Stephane Glondu's avatar
Stephane Glondu committed
178 179 180 181 182 183 184 185 186 187 188
      ) in
      let module R = struct
        let register () =
          try_lwt
            Lwt_unix.mkdir dir 0o700 >>
            Lwt_io.(with_file Output (dir/"election.json") (fun oc ->
              write_line oc raw_election
            )) >>
            Lwt_io.(with_file Output (dir/"public_keys.jsons") (fun oc ->
              write_lines oc public_keys
            )) >>
Stephane Glondu's avatar
Stephane Glondu committed
189 190 191
            Lwt_io.(with_file Output (dir/"voters.txt") (fun oc ->
              write_lines oc voters
            )) >>
Stephane Glondu's avatar
Stephane Glondu committed
192 193
            let election = do_register () in
            let module W = (val election : WEB_ELECTION) in
194 195 196 197 198 199 200 201 202 203 204
            lwt () =
              match W.metadata.e_auth_config with
              | None -> return ()
              | Some xs ->
                 let auth_config =
                   List.map (fun {auth_system; auth_instance; auth_config} ->
                     auth_instance, (auth_system, List.map snd auth_config)
                   ) xs
                 in
                 Web_persist.set_auth_config uuid auth_config
            in
Stephane Glondu's avatar
Stephane Glondu committed
205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230
            let () =
              Ocsigen_messages.debug (fun () ->
                Printf.sprintf "Injecting credentials for %s" uuid
              )
            in
            public_creds |>
            Lwt_stream.iter_s W.B.inject_cred >>
            W.B.update_files () >>
            Ocsipersist.add election_ptable uuid (raw_election, web_params) >>
            let () = Lwt_mutex.unlock registration_mutex in
            return election
          with e ->
            lwt () =
              try_lwt delete_shallow_directory dir
              with e ->
                Printf.ksprintf
                  (fun s ->
                   return (Ocsigen_messages.unexpected_exception e s))
                  "error while deleting %s after failure of %s"
                  dir uuid
            in
            Lwt_mutex.unlock registration_mutex;
            Lwt.fail e
      end in
      (* until here, no side-effects on the running server *)
      return @@ Some (module R : REGISTRABLE_ELECTION)
Stephane Glondu's avatar
Stephane Glondu committed
231
    )
Stephane Glondu's avatar
Stephane Glondu committed
232 233 234 235 236 237 238
  with e ->
    Lwt_mutex.unlock registration_mutex;
    Lwt.fail e

lwt () =
  Ocsipersist.iter_step (fun uuid (raw_election, web_params) ->
    let params = Group.election_params_of_string raw_election in
239
    let do_register = register_election params web_params in
Stephane Glondu's avatar
Stephane Glondu committed
240 241 242 243 244 245 246 247 248 249 250
    let election = do_register () in
    let module W = (val election : WEB_ELECTION) in
    assert (uuid = Uuidm.to_string W.election.e_params.e_uuid);
    Ocsigen_messages.debug (fun () ->
      Printf.sprintf "Initialized election %s from persistent store" uuid
    );
    return ()
  ) election_ptable

let () = Any.register ~service:home
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
251
    Eliom_reference.unset Web_auth_state.cont >>
252
    match_lwt Web_persist.get_main_election () with
Stephane Glondu's avatar
Stephane Glondu committed
253 254
    | None ->
      lwt featured =
255
        Web_persist.get_featured_elections () >>=
Stephane Glondu's avatar
Stephane Glondu committed
256
        Lwt_list.map_p (fun x -> return @@ SMap.find x !election_table)
257
      in
Stephane Glondu's avatar
Stephane Glondu committed
258 259 260 261 262 263 264 265 266
      T.home ~featured () >>= Html5.send
    | Some x ->
      let module W = (val SMap.find x !election_table : WEB_ELECTION) in
      Redirection.send
        (preapply election_home (W.election.e_params.e_uuid, ()))
  )

let () = Html5.register ~service:admin
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
267 268 269
    let cont () = Redirection.send admin in
    Eliom_reference.set Web_auth_state.cont [cont] >>
    lwt site_user = Web_auth_state.get_site_user () in
Stephane Glondu's avatar
Stephane Glondu committed
270
    lwt elections =
271
      match site_user with
272
      | None -> return None
Stephane Glondu's avatar
Stephane Glondu committed
273
      | Some u ->
274 275 276 277 278 279 280 281 282 283 284 285
         lwt elections =
           SMap.fold (fun _ w accu ->
             let module W = (val w : WEB_ELECTION) in
             if W.metadata.e_owner = Some u then (
               w :: accu
             ) else (
               accu
             )
           ) !election_table [] |> List.rev |> return
         and setup_elections =
           Ocsipersist.fold_step (fun k v accu ->
             if v.se_owner = u
286
             then return ((uuid_of_string k, v.se_questions.t_name) :: accu)
287 288 289
             else return accu
           ) election_stable []
         in return @@ Some (elections, setup_elections)
Stephane Glondu's avatar
Stephane Glondu committed
290
    in
291
    T.admin ~elections ()
Stephane Glondu's avatar
Stephane Glondu committed
292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307
  )

let () = File.register
  ~service:source_code
  ~content_type:"application/x-gzip"
  (fun () () -> return !source_file)

let do_get_randomness =
  let prng = Lazy.lazy_from_fun (Lwt_preemptive.detach (fun () ->
    pseudo_rng (random_string secure_rng 16)
  )) in
  let mutex = Lwt_mutex.create () in
  fun () ->
    Lwt_mutex.with_lock mutex (fun () ->
      lwt prng = Lazy.force prng in
      return (random_string prng 32)
308 309
    )

Stephane Glondu's avatar
Stephane Glondu committed
310 311 312 313 314 315 316 317 318 319 320 321 322
let () = String.register
  ~service:get_randomness
  (fun () () ->
    lwt r = do_get_randomness () in
    b64_encode_compact r |>
    (fun x -> string_of_randomness { randomness=x }) |>
    (fun x -> return (x, "application/json"))
  )

let generate_uuid = Uuidm.v4_gen (Random.State.make_self_init ())

let () = Redirection.register ~service:election_setup_new
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
323
   match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
324 325 326 327 328 329 330 331
   | Some u ->
      let uuid = generate_uuid () in
      let uuid_s = Uuidm.to_string uuid in
      lwt token = generate_token () in
      let se_metadata = {
        e_voting_starts_at = None;
        e_voting_ends_at = None;
        e_owner = Some u;
332
        e_auth_config = Some [{auth_system = "password"; auth_instance = "password"; auth_config = []}];
Stephane Glondu's avatar
Stephane Glondu committed
333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348
      } in
      let question = {
        q_answers = [| "Answer 1"; "Answer 2" |];
        q_min = 0;
        q_max = 1;
        q_question = "Question 1?";
      } in
      let se_questions = {
        t_description = "Description of the election.";
        t_name = "Name of the election";
        t_questions = [| question |];
        t_short_name = "short_name";
      } in
      let se = {
        se_owner = u;
        se_group = "{\"g\":\"14887492224963187634282421537186040801304008017743492304481737382571933937568724473847106029915040150784031882206090286938661464458896494215273989547889201144857352611058572236578734319505128042602372864570426550855201448111746579871811249114781674309062693442442368697449970648232621880001709535143047913661432883287150003429802392229361583608686643243349727791976247247948618930423866180410558458272606627111270040091203073580238905303994472202930783207472394578498507764703191288249547659899997131166130259700604433891232298182348403175947450284433411265966789131024573629546048637848902243503970966798589660808533\",\"p\":\"16328632084933010002384055033805457329601614771185955389739167309086214800406465799038583634953752941675645562182498120750264980492381375579367675648771293800310370964745767014243638518442553823973482995267304044326777047662957480269391322789378384619428596446446984694306187644767462460965622580087564339212631775817895958409016676398975671266179637898557687317076177218843233150695157881061257053019133078545928983562221396313169622475509818442661047018436264806901023966236718367204710755935899013750306107738002364137917426595737403871114187750804346564731250609196846638183903982387884578266136503697493474682071\",\"q\":\"61329566248342901292543872769978950870633559608669337131139375508370458778917\"}";
Stephane Glondu's avatar
Stephane Glondu committed
349
        se_voters = [];
Stephane Glondu's avatar
Stephane Glondu committed
350 351 352 353 354 355 356 357 358 359 360
        se_questions;
        se_public_keys = [];
        se_metadata;
        se_public_creds = token;
      } in
      lwt () = Ocsipersist.add election_stable uuid_s se in
      lwt () = Ocsipersist.add election_credtokens token uuid_s in
      return (preapply election_setup uuid)
  | None -> forbidden ()
  )

361 362 363 364 365 366 367 368 369 370
let generic_setup_page f uuid () =
  match_lwt Web_auth_state.get_site_user () with
  | Some u ->
     let uuid_s = Uuidm.to_string uuid in
     lwt se = Ocsipersist.find election_stable uuid_s in
     if se.se_owner = u
     then f uuid se ()
     else forbidden ()
  | None -> forbidden ()

Stephane Glondu's avatar
Stephane Glondu committed
371
let () = Html5.register ~service:election_setup
372
  (generic_setup_page T.election_setup)
Stephane Glondu's avatar
Stephane Glondu committed
373

374
let () = Html5.register ~service:election_setup_trustees
375 376 377 378
  (generic_setup_page T.election_setup_trustees)

let () = Html5.register ~service:election_setup_credential_authority
  (generic_setup_page T.election_setup_credential_authority)
379

Stephane Glondu's avatar
Stephane Glondu committed
380 381 382
let election_setup_mutex = Lwt_mutex.create ()

let handle_setup f cont uuid x =
Stephane Glondu's avatar
Stephane Glondu committed
383
  match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
384 385 386 387 388 389
  | Some u ->
     let uuid_s = Uuidm.to_string uuid in
     Lwt_mutex.with_lock election_setup_mutex (fun () ->
       lwt se = Ocsipersist.find election_stable uuid_s in
       if se.se_owner = u then (
         try_lwt
390
           f se x u uuid;
Stephane Glondu's avatar
Stephane Glondu committed
391 392 393
           Ocsipersist.add election_stable uuid_s se >>
           Redirection.send (preapply cont uuid)
         with e ->
394
           T.generic_page ~title:"Error" (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
395 396 397
       ) else forbidden ()
     )
  | None -> forbidden ()
398

399 400 401 402 403 404 405 406 407 408
let () =
  Any.register
    ~service:election_setup_description
    (handle_setup
       (fun se (name, description) _ _ ->
         se.se_questions <- {se.se_questions with
           t_name = name;
           t_description = description;
         }) election_setup)

Stephane Glondu's avatar
Stephane Glondu committed
409 410 411 412
let () =
  Any.register
    ~service:election_setup_group
    (handle_setup
413
       (fun se x _ _ ->
Stephane Glondu's avatar
Stephane Glondu committed
414 415 416
        let _group = Group.of_string x in
        (* we keep it as a string since it contains a type *)
        se.se_group <- x) election_setup)
417

Stephane Glondu's avatar
Stephane Glondu committed
418 419 420 421
let () =
  Any.register
    ~service:election_setup_metadata
    (handle_setup
422
       (fun se x u _ ->
Stephane Glondu's avatar
Stephane Glondu committed
423 424 425
        let metadata = metadata_of_string x in
        if metadata.e_owner <> Some u then failwith "wrong owner";
        se.se_metadata <- metadata) election_setup)
426

427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468
let () =
  Any.register
    ~service:election_setup_auth
    (handle_setup
       (fun se auth_system _ _ ->
         match auth_system with
         | Some (("dummy" | "password") as auth_system) ->
            se.se_metadata <- {
              se.se_metadata with
                e_auth_config = Some [{
                  auth_system;
                  auth_instance = auth_system;
                  auth_config = []
                }]
            }
         | Some "cas" ->
            se.se_metadata <- {
              se.se_metadata with
                e_auth_config = Some [{
                  auth_system = "cas";
                  auth_instance = "cas";
                  auth_config = ["server", ""];
                }]
            }
         | Some x -> failwith ("unknown authentication system: "^x)
         | None -> failwith "no authentication system was given"
       ) election_setup)

let () =
  Any.register
    ~service:election_setup_auth_cas
    (handle_setup
       (fun se server _ _ ->
         se.se_metadata <- {
           se.se_metadata with
             e_auth_config = Some [{
               auth_system = "cas";
               auth_instance = "cas";
               auth_config = ["server", server];
             }]
         }) election_setup)

469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490
let template_password = format_of_string
  "You are listed as a voter for the election

  %s

You will find below your login and password.  To cast a vote, you will
also need a credential, sent in a separate email.  Be careful,
passwords and credentials look similar but play different roles.  You
will be asked to enter your credential before entering the voting
booth.  Login and passwords are required once your ballot is ready to
be cast.

Username: %s
Password: %s
Page of the election: %s

Note that you are allowed to vote several times.  Only the last vote
counts.

-- 
Belenios"

491 492 493 494 495 496 497 498 499 500
let () =
  Any.register
    ~service:election_setup_auth_genpwd
    (handle_setup
       (fun se () _ uuid ->
         let table =
           "password_" ^
           let u = Uuidm.to_string uuid in
           underscorize u
         in
501 502 503 504 505
         let title = se.se_questions.t_name in
         let url = Eliom_uri.make_string_uri
           ~absolute:true ~service:election_home
           (uuid, ()) |> rewrite_prefix
         in
506 507 508 509 510 511
         let table = Ocsipersist.open_table table in
         Lwt_list.iter_s (fun v ->
           lwt salt = generate_token () in
           lwt password = generate_token () in
           let hashed = sha256_hex (salt ^ password) in
           lwt () = Ocsipersist.add table v (salt, hashed) in
512 513
           let body = Printf.sprintf template_password title v password url in
           let subject = "Your password for election " ^ title in
514 515 516 517
           lwt () = send_email "noreply@belenios.org" v subject body in
           return ()
         ) se.se_voters) election_setup)

Stephane Glondu's avatar
Stephane Glondu committed
518 519 520 521
let () =
  Html5.register
    ~service:election_setup_questions
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
522
     match_lwt Web_auth_state.get_site_user () with
523 524
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
Stephane Glondu's avatar
Stephane Glondu committed
525 526
        lwt se = Ocsipersist.find election_stable uuid_s in
        if se.se_owner = u
527
        then T.election_setup_questions uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
528 529
        else forbidden ()
     | None -> forbidden ()
530 531
    )

Stephane Glondu's avatar
Stephane Glondu committed
532 533 534 535
let () =
  Any.register
    ~service:election_setup_questions_post
    (handle_setup
536
       (fun se x _ _ ->
Stephane Glondu's avatar
Stephane Glondu committed
537 538
        se.se_questions <- template_of_string x) election_setup_questions)

Stephane Glondu's avatar
Stephane Glondu committed
539 540 541 542
let () =
  Html5.register
    ~service:election_setup_voters
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
543
      match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
544 545 546 547
      | Some u ->
         let uuid_s = Uuidm.to_string uuid in
         lwt se = Ocsipersist.find election_stable uuid_s in
         if se.se_owner = u
548
         then T.election_setup_voters uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565
         else forbidden ()
      | None -> forbidden ()
    )

(* see http://www.regular-expressions.info/email.html *)
let email_rex = Pcre.regexp
  ~flags:[`CASELESS]
  "^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,7}$"

let is_email x =
  try ignore (Pcre.pcre_exec ~rex:email_rex x); true
  with Not_found -> false

let () =
  Any.register
    ~service:election_setup_voters_post
    (handle_setup
566
       (fun se x _ _ ->
Stephane Glondu's avatar
Stephane Glondu committed
567 568 569 570 571 572 573 574 575
         let xs = Pcre.split x in
         let () =
           try
             let bad = List.find (fun x -> not (is_email x)) xs in
             Printf.ksprintf failwith "%S is not a valid address" bad
           with Not_found -> ()
         in
         se.se_voters <- xs) election_setup)

Stephane Glondu's avatar
Stephane Glondu committed
576 577 578
let () =
  Redirection.register
    ~service:election_setup_trustee_add
579
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
580
     match_lwt Web_auth_state.get_site_user () with
581 582
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
Stephane Glondu's avatar
Stephane Glondu committed
583 584 585 586 587 588 589 590 591 592
        Lwt_mutex.with_lock election_setup_mutex (fun () ->
          lwt se = Ocsipersist.find election_stable uuid_s in
          if se.se_owner = u
          then (
            lwt token = generate_token () in
            se.se_public_keys <- (token, ref "") :: se.se_public_keys;
            Ocsipersist.add election_stable uuid_s se >>
            Ocsipersist.add election_pktokens token uuid_s
          ) else forbidden ()
        ) >>
593
        return (preapply election_setup_trustees uuid)
594 595 596 597 598 599 600
     | None -> forbidden ()
    )

let () =
  Redirection.register
    ~service:election_setup_trustee_del
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
601
     match_lwt Web_auth_state.get_site_user () with
602 603 604 605 606 607 608 609 610 611 612 613 614 615
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
        Lwt_mutex.with_lock election_setup_mutex (fun () ->
          lwt se = Ocsipersist.find election_stable uuid_s in
          if se.se_owner = u
          then (
            match se.se_public_keys with
            | (token, _) :: xs ->
               se.se_public_keys <- xs;
               Ocsipersist.add election_stable uuid_s se >>
               Ocsipersist.remove election_pktokens token
            | _ -> return ()
          ) else forbidden ()
        ) >>
616
        return (preapply election_setup_trustees uuid)
617 618 619
     | None -> forbidden ()
    )

Stephane Glondu's avatar
Stephane Glondu committed
620 621 622 623 624 625 626 627
let () =
  Html5.register
    ~service:election_setup_credentials
    (fun token () ->
     lwt uuid = Ocsipersist.find election_credtokens token in
     lwt se = Ocsipersist.find election_stable uuid in
     T.election_setup_credentials token uuid se ()
    )
628

Stephane Glondu's avatar
Stephane Glondu committed
629 630 631 632 633 634 635 636
let () =
  File.register
    ~service:election_setup_credentials_download
    ~content_type:"text/plain"
    (fun token () ->
     lwt uuid = Ocsipersist.find election_credtokens token in
     return (!spool_dir / uuid ^ ".public_creds.txt")
    )
637

Stephane Glondu's avatar
Stephane Glondu committed
638 639 640
let wrap_handler f =
  try_lwt f ()
  with
641
  | e -> T.generic_page ~title:"Error" (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667

let handle_credentials_post token creds =
  lwt uuid = Ocsipersist.find election_credtokens token in
  lwt se = Ocsipersist.find election_stable uuid in
  let module G = (val Group.of_string se.se_group : GROUP) in
  let fname = !spool_dir / uuid ^ ".public_creds.txt" in
  Lwt_mutex.with_lock
    election_setup_mutex
    (fun () ->
     Lwt_io.with_file
       ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
       ~perm:0o600 ~mode:Lwt_io.Output fname
       (fun oc -> Lwt_io.write_chars oc creds)
    ) >>
  lwt () =
    let i = ref 1 in
    Lwt_stream.iter
      (fun x ->
       try
         let x = G.of_string x in
         if not (G.check x) then raise Exit;
         incr i
       with _ ->
         Printf.ksprintf failwith "invalid credential at line %d" !i)
      (Lwt_io.lines_of_file fname)
  in
668 669
  T.generic_page ~title:"Success"
    "Credentials have been received and checked!" () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
670 671 672 673 674 675 676

let () =
  Any.register
    ~service:election_setup_credentials_post
    (fun token creds ->
     let s = Lwt_stream.of_string creds in
     wrap_handler (fun () -> handle_credentials_post token s))
677

Stephane Glondu's avatar
Stephane Glondu committed
678 679 680 681 682 683 684
let () =
  Any.register
    ~service:election_setup_credentials_post_file
    (fun token creds ->
     let s = Lwt_io.chars_of_file creds.Ocsigen_extensions.tmp_filename in
     wrap_handler (fun () -> handle_credentials_post token s))

685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727
module Credgen = struct
  module String = PString

  (* FIXME: duplicate of Tool_credgen *)

  let get_random_char =
    let prng = Lazy.lazy_from_fun (Lwt_preemptive.detach (fun () ->
      pseudo_rng (random_string secure_rng 16)
    )) in
    let mutex = Lwt_mutex.create () in
    fun () ->
      Lwt_mutex.with_lock mutex (fun () ->
        lwt prng = Lazy.force prng in
        let s = random_string prng 1 in
        return @@ s.[0]
      )

  (* Beware: the following must be changed in accordance with the booth! *)
  let digits = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
  let token_length = 14
  let n58 = Z.of_int 58
  let n53 = Z.of_int 53

  let generate_raw_token () =
    let res = String.create token_length in
    let rec loop i accu =
      if i < token_length then (
        lwt digit = get_random_char () in
        let digit = int_of_char digit mod 58 in
        res.[i] <- digits.[digit];
        loop (i+1) Z.(n58 * accu + of_int digit)
      ) else return (res, accu)
    in loop 0 Z.zero

  let add_checksum (raw, value) =
    let checksum = 53 - Z.(to_int (value mod n53)) in
    return (raw ^ String.make 1 digits.[checksum])

  let generate () =
    generate_raw_token () >>= add_checksum

end

728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749
let template_credential = format_of_string
  "You are listed as a voter for the election

  %s

You will find below your login and credential.  To cast a vote, you will
also need a password, sent in a separate email.  Be careful,
passwords and credentials look similar but play different roles.  You
will be asked to enter your credential before entering the voting
booth.  Login and passwords are required once your ballot is ready to
be cast.

Username: %s
Credential: %s
Page of the election: %s

Note that you are allowed to vote several times.  Only the last vote
counts.

-- 
Belenios"

750 751 752
let () =
  Any.register
    ~service:election_setup_credentials_server
753
    (handle_setup (fun se () _ uuid ->
754
      let uuid_s = Uuidm.to_string uuid in
755 756 757 758 759
      let title = se.se_questions.t_name in
      let url = Eliom_uri.make_string_uri
        ~absolute:true ~service:election_home
        (uuid, ()) |> rewrite_prefix
      in
760 761 762 763 764 765 766 767 768 769 770 771
      lwt se = Ocsipersist.find election_stable uuid_s in
      let module S = Set.Make (PString) in
      let module G = (val Group.of_string se.se_group : GROUP) in
      lwt creds =
        Lwt_list.fold_left_s (fun accu id ->
          lwt cred = Credgen.generate () in
          let priv_cred = derive_cred uuid cred in
          let pub_cred =
            let x = Z.(of_string_base 16 priv_cred mod G.q) in
            let y = G.(g **~ x) in
            G.to_string y
          in
772 773
          let body = Printf.sprintf template_credential title id cred url in
          let subject = "Your credential for election " ^ title in
774
          lwt () = send_email "noreply@belenios.org" id subject body in
775 776 777 778 779 780 781 782 783 784 785 786 787 788 789
          return @@ S.add pub_cred accu
        ) S.empty se.se_voters
      in
      let creds = S.elements creds in
      let fname = !spool_dir / uuid_s ^ ".public_creds.txt" in
      lwt () = Lwt_mutex.with_lock election_setup_mutex
        (fun () ->
          Lwt_io.with_file
            ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
            ~perm:0o600 ~mode:Lwt_io.Output fname
            (fun oc ->
              Lwt_list.iter_s (Lwt_io.write_line oc) creds))
      in
      T.generic_page ~title:"Success"
        "Credentials have been generated and mailed!" () >>= Html5.send)
790 791
       election_setup
    )
792

Stephane Glondu's avatar
Stephane Glondu committed
793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820
let () =
  Html5.register
    ~service:election_setup_trustee
    (fun token () ->
     lwt uuid = Ocsipersist.find election_pktokens token in
     lwt se = Ocsipersist.find election_stable uuid in
     T.election_setup_trustee token uuid se ()
    )

let () =
  Any.register
    ~service:election_setup_trustee_post
    (fun token public_key ->
     wrap_handler
       (fun () ->
        lwt uuid = Ocsipersist.find election_pktokens token in
        Lwt_mutex.with_lock
          election_setup_mutex
          (fun () ->
           lwt se = Ocsipersist.find election_stable uuid in
           let pkref = List.assoc token se.se_public_keys in
           let module G = (val Group.of_string se.se_group : GROUP) in
           let pk = trustee_public_key_of_string G.read public_key in
           let module KG = Election.MakeSimpleDistKeyGen (G) (LwtRandom) in
           if not (KG.check pk) then failwith "invalid public key";
           (* we keep pk as a string because of G.t *)
           pkref := public_key;
           Ocsipersist.add election_stable uuid se
821 822 823
          ) >> T.generic_page ~title:"Success"
            "Your key has been received and checked!"
            () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
824 825 826 827 828 829 830
       )
    )

let () =
  Any.register
    ~service:election_setup_create
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
831
     match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
832 833 834
     | None -> forbidden ()
     | Some u ->
        begin try_lwt
835 836 837
          let uuid_s = Uuidm.to_string uuid in
          Lwt_mutex.with_lock election_setup_mutex (fun () ->
            lwt se = Ocsipersist.find election_stable uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
838 839 840
            if se.se_owner <> u then forbidden () else
            let group = Group.of_string se.se_group in
            let module G = (val group : GROUP) in
841
            let module KG = Election.MakeSimpleDistKeyGen (G) (LwtRandom) in
Stephane Glondu's avatar
Stephane Glondu committed
842
            (* construct election data in memory *)
843
            lwt public_keys, private_key =
Stephane Glondu's avatar
Stephane Glondu committed
844
              match se.se_public_keys with
845 846 847 848 849 850 851 852 853
              | [] ->
                 lwt private_key, public_key = KG.generate_and_prove () in
                 return ([public_key], Some private_key)
              | _ :: _ ->
                 return (List.rev_map
                   (fun (_, r) ->
                     if !r = "" then failwith "some public keys are missing";
                     trustee_public_key_of_string G.read !r
                   ) se.se_public_keys, None)
Stephane Glondu's avatar
Stephane Glondu committed
854 855 856 857 858 859
            in
            let y = KG.combine (Array.of_list public_keys) in
            let template = se.se_questions in
            let params = {
              e_description = template.t_description;
              e_name = template.t_name;
860
              e_public_key = {wpk_group = G.group; wpk_y = y};
Stephane Glondu's avatar
Stephane Glondu committed
861 862 863 864 865 866 867 868 869
              e_questions = template.t_questions;
              e_uuid = uuid;
              e_short_name = template.t_short_name;
            } in
            let files = {
              f_election = !spool_dir / uuid_s ^ ".election.json";
              f_metadata = !spool_dir / uuid_s ^ ".metadata.json";
              f_public_keys = !spool_dir / uuid_s ^ ".public_keys.jsons";
              f_public_creds = !spool_dir / uuid_s ^ ".public_creds.txt";
Stephane Glondu's avatar
Stephane Glondu committed
870
              f_voters = !spool_dir / uuid_s ^ ".voters.txt";
Stephane Glondu's avatar
Stephane Glondu committed
871 872 873 874 875 876
            } in
            lwt _ =
              try_lwt Lwt_unix.stat files.f_public_creds
              with _ -> failwith "public credentials are missing"
            in
            (* write election files to disk *)
877
            let create_file fname what xs =
Stephane Glondu's avatar
Stephane Glondu committed
878 879 880
              Lwt_io.with_file
                ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
                ~perm:0o600 ~mode:Lwt_io.Output fname
881 882 883 884 885
                (fun oc ->
                  Lwt_list.iter_s
                    (fun v ->
                      Lwt_io.write oc (what v) >>
                      Lwt_io.write oc "\n") xs)
Stephane Glondu's avatar
Stephane Glondu committed
886
            in
887 888 889 890
            create_file files.f_election (string_of_params (write_wrapped_pubkey G.write_group G.write)) [params] >>
            create_file files.f_metadata string_of_metadata [se.se_metadata] >>
            create_file files.f_voters (fun x -> x) se.se_voters >>
            create_file files.f_public_keys (string_of_trustee_public_key G.write) public_keys >>
Stephane Glondu's avatar
Stephane Glondu committed
891 892 893
            (* actually create the election *)
            begin match_lwt import_election files with
            | None ->
894
               T.new_election_failure `Exists () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
895 896 897 898
            | Some w ->
               let module W = (val w : REGISTRABLE_ELECTION) in
               lwt w = W.register () in
               let module W = (val w : WEB_ELECTION) in
899 900 901 902 903 904
               (* create file with private key, if any *)
               lwt () =
                 match private_key with
                 | None -> return ()
                 | Some x ->
                    let fname = W.dir / "private_key.json" in
905
                    create_file fname string_of_number [x]
906
               in
Stephane Glondu's avatar
Stephane Glondu committed
907 908 909 910 911
               (* clean up temporary files *)
               Lwt_unix.unlink files.f_election >>
               Lwt_unix.unlink files.f_metadata >>
               Lwt_unix.unlink files.f_public_keys >>
               Lwt_unix.unlink files.f_public_creds >>
Stephane Glondu's avatar
Stephane Glondu committed
912
               Lwt_unix.unlink files.f_voters >>
Stephane Glondu's avatar
Stephane Glondu committed
913 914 915 916 917 918 919 920 921 922 923 924
               (* clean up tokens *)
               Ocsipersist.remove election_credtokens se.se_public_creds >>
               Lwt_list.iter_s
                 (fun (token, _) ->
                  Ocsipersist.remove election_pktokens token)
                 se.se_public_keys >>
               Ocsipersist.remove election_stable uuid_s >>
               Redirection.send
                 (preapply election_admin (W.election.e_params.e_uuid, ()))
            end
          )
        with e ->
925
          T.new_election_failure (`Exception e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
926 927
        end
    )
928

Stephane Glondu's avatar
Stephane Glondu committed
929 930 931 932
let () =
  Any.register
    ~service:election_home
    (fun (uuid, ()) () ->
933
      let uuid_s = Uuidm.to_string uuid in
934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954
      try
        let w = SMap.find uuid_s !election_table in
        let module W = (val w : WEB_ELECTION) in
        Eliom_reference.unset Web_services.ballot >>
        let cont () =
          Redirection.send
            (Eliom_service.preapply
               election_home (W.election.e_params.e_uuid, ()))
        in
        Eliom_reference.set Web_auth_state.cont [cont] >>
        match_lwt Eliom_reference.get Web_services.cast_confirmed with
        | Some result ->
           Eliom_reference.unset Web_services.cast_confirmed >>
           T.cast_confirmed (module W) ~result () >>= Html5.send
        | None ->
           lwt state = Web_persist.get_election_state uuid_s in
           T.election_home (module W) state () >>= Html5.send
      with Not_found ->
        T.generic_page ~title:"Error"
          "This election does not exist yet. Please come back later." ()
          >>= Html5.send)
955

Stephane Glondu's avatar
Stephane Glondu committed
956 957 958 959 960 961
let () =
  Any.register
    ~service:election_admin
    (fun (uuid, ()) () ->
     let uuid_s = Uuidm.to_string uuid in
     let w = SMap.find uuid_s !election_table in
Stephane Glondu's avatar
Stephane Glondu committed
962
     lwt site_user = Web_auth_state.get_site_user () in
963
     lwt is_featured = Web_persist.is_featured_election uuid_s in
964 965 966 967 968
     let module W = (val w : WEB_ELECTION) in
     let uuid = Uuidm.to_string W.election.e_params.e_uuid in
     match site_user with
     | Some u when W.metadata.e_owner = Some u ->
        lwt state = Web_persist.get_election_state uuid in
969
        T.election_admin (module W) ~is_featured state () >>= Html5.send
970 971
       | _ -> forbidden ()
    )
972

Stephane Glondu's avatar
Stephane Glondu committed
973 974 975 976 977 978 979
let () =
  Any.register
    ~service:election_set_state
    (fun (uuid, ()) state ->
     let uuid_s = Uuidm.to_string uuid in
     let w = SMap.find uuid_s !election_table in
     let module W = (val w : WEB_ELECTION) in
980
     lwt () =
Stephane Glondu's avatar
Stephane Glondu committed
981
       match_lwt Web_auth_state.get_site_user () with
982 983 984 985 986 987 988 989 990 991 992
       | Some u when W.metadata.e_owner = Some u -> return ()
       | _ -> forbidden ()
     in
     lwt () =
       match_lwt Web_persist.get_election_state uuid_s with
       | `Open | `Closed -> return ()
       | _ -> forbidden ()
     in
     let state = if state then `Open else `Closed in
     Web_persist.set_election_state uuid_s state >>
     Redirection.send (preapply election_admin (uuid, ())))
993

Stephane Glondu's avatar
Stephane Glondu committed
994 995 996 997 998 999
let () =
  Any.register
    ~service:election_update_credential
    (fun (uuid, ()) () ->
     let uuid_s = Uuidm.to_string uuid in
     let w = SMap.find uuid_s !election_table in
Stephane Glondu's avatar
Stephane Glondu committed
1000
     lwt site_user = Web_auth_state.get_site_user () in
1001 1002 1003 1004
     let module W = (val w : WEB_ELECTION) in
     match site_user with
     | Some u ->
        if W.metadata.e_owner = Some u then (
1005
          T.update_credential (module W) () >>= Html5.send
1006 1007 1008 1009
        ) else (
          forbidden ()
        )
     | _ -> forbidden ())
Stephane Glondu's avatar
Stephane Glondu committed
1010 1011 1012 1013

let () =
  Any.register
    ~service:election_update_credential_post
1014
    (fun (uuid, ()) (old, new_) ->
Stephane Glondu's avatar
Stephane Glondu committed
1015 1016
     let uuid_s = Uuidm.to_string uuid in
     let w = SMap.find uuid_s !election_table in
Stephane Glondu's avatar
Stephane Glondu committed
1017
     lwt site_user = Web_auth_state.get_site_user () in
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031
     let module W = (val w : WEB_ELECTION) in
     match site_user with
     | Some u ->
       if W.metadata.e_owner = Some u then (
         try_lwt
           W.B.update_cred ~old ~new_ >>
           String.send ("OK", "text/plain")
         with Error e ->
           String.send ("Error: " ^ explain_error e, "text/plain")
       ) >>= (fun x -> return @@ cast_unknown_content_kind x)
       else (
         forbidden ()
       )
     | _ -> forbidden ())
Stephane Glondu's avatar
Stephane Glondu committed
1032 1033 1034 1035

let () =
  Any.register
    ~service:election_vote
1036
    (fun (uuid, ()) () ->
1037 1038 1039 1040 1041 1042 1043 1044 1045 1046
      let uuid_s = Uuidm.to_string uuid in
      let w = SMap.find uuid_s !election_table in
      let module W = (val w : WEB_ELECTION) in
      Eliom_reference.unset Web_services.ballot >>
      Redirection.send
        (Eliom_service.preapply
           (Eliom_service.static_dir_with_params
              ~get_params:(Eliom_parameter.string "election_url") ())
           (["static"; "vote.html"],
            "../elections/" ^ uuid_s ^ "/")))
1047

Stephane Glondu's avatar
Stephane Glondu committed
1048 1049 1050
let () =
  Any.register
    ~service:election_cast
1051
    (fun (uuid, ()) () ->
1052 1053 1054
      let uuid_s = Uuidm.to_string uuid in
      let w = SMap.find uuid_s !election_table in
      let module W = (val w : WEB_ELECTION) in
Stephane Glondu's avatar
Stephane Glondu committed
1055
      let cont () =
1056 1057 1058 1059
        Redirection.send
          (Eliom_service.preapply
             election_cast (W.election.e_params.e_uuid, ()))
      in
Stephane Glondu's avatar
Stephane Glondu committed
1060
      Eliom_reference.set Web_auth_state.cont [cont] >>
1061 1062 1063
      match_lwt Eliom_reference.get Web_services.ballot with
      | Some b -> T.cast_confirmation w (sha256_b64 b) () >>= Html5.send
      | None -> T.cast_raw w () >>= Html5.send)
Stephane Glondu's avatar
Stephane Glondu committed
1064 1065 1066 1067

let () =
  Any.register
    ~service:election_cast_post
1068 1069 1070 1071
    (fun (uuid, ()) (ballot_raw, ballot_file) ->
      let uuid_s = Uuidm.to_string uuid in
      let w = SMap.find uuid_s !election_table in
      let module W = (val w : WEB_ELECTION) in
Stephane Glondu's avatar
Stephane Glondu committed
1072
      lwt user = Web_auth_state.get_election_user uuid in
1073 1074 1075 1076 1077 1078 1079
      lwt the_ballot = match ballot_raw, ballot_file with
        | Some ballot, None -> return ballot
        | None, Some fi ->
           let fname = fi.Ocsigen_extensions.tmp_filename in
           Lwt_stream.to_string (Lwt_io.chars_of_file fname)
        | _, _ -> fail_http 400
      in
Stephane Glondu's avatar
Stephane Glondu committed
1080
      let cont () =
1081 1082 1083 1084
        Redirection.send
          (Eliom_service.preapply
             Web_services.election_cast (W.election.e_params.e_uuid, ()))
      in
Stephane Glondu's avatar
Stephane Glondu committed
1085
      Eliom_reference.set Web_auth_state.cont [cont] >>
1086 1087 1088 1089 1090 1091 1092
      Eliom_reference.set Web_services.ballot (Some the_ballot) >>
      match user with
      | None ->
         Redirection.send
           (Eliom_service.preapply
              Web_services.election_login
              ((W.election.e_params.e_uuid, ()), None))
Stephane Glondu's avatar
Stephane Glondu committed
1093
      | Some u -> cont ())
1094

Stephane Glondu's avatar
Stephane Glondu committed
1095 1096 1097
let () =
  Any.register
    ~service:election_cast_confirm
1098
    (fun (uuid, ()) () ->
1099 1100 1101 1102 1103 1104 1105
      let uuid_s = Uuidm.to_string uuid in
      let w = SMap.find uuid_s !election_table in
      let module W = (val w : WEB_ELECTION) in
      match_lwt Eliom_reference.get Web_services.ballot with
      | Some the_ballot ->
         begin
           Eliom_reference.unset Web_services.ballot >>
Stephane Glondu's avatar
Stephane Glondu committed
1106
           match_lwt Web_auth_state.get_election_user uuid with
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121
           | Some u ->
              let record = string_of_user u, now () in
              lwt result =
                try_lwt
                  lwt hash = W.B.cast the_ballot record in
                  return (`Valid hash)
                with Error e -> return (`Error e)
              in
              Eliom_reference.set Web_services.cast_confirmed (Some result) >>
              Redirection.send
                (Eliom_service.preapply
                   election_home (W.election.e_params.e_uuid, ()))
           | None -> forbidden ()
         end
      | None -> fail_http 404)
1122

1123 1124 1125 1126
let () =
  Any.register
    ~service:election_pretty_ballots
    (fun ((uuid, ()), start) () ->
1127 1128 1129 1130 1131 1132
      let uuid_s = Uuidm.to_string uuid in
      let w = SMap.find uuid_s !election_table in
      let module W = (val w : WEB_ELECTION) in
      lwt res, _ =
        W.B.Ballots.fold
          (fun h _ (accu, i) ->
1133 1134 1135
            if i >= start && i < start+50 then
              return (h :: accu, i+1)
            else return (accu, i+1)
1136 1137
          ) ([], 1)
      in T.pretty_ballots (module W) res () >>= Html5.send)
1138 1139 1140 1141 1142

let () =
  Any.register
    ~service:election_pretty_ballot
    (fun ((uuid, ()), hash) () ->
1143 1144 1145 1146 1147 1148
      let uuid_s = Uuidm.to_string uuid in
      let w = SMap.find uuid_s !election_table in
      let module W = (val w : WEB_ELECTION) in
      lwt ballot =
        W.B.Ballots.fold
          (fun h b accu ->
1149
            if h = hash then return (Some b) else return accu
1150 1151 1152 1153 1154 1155 1156
          ) None
      in
      match ballot with
      | None -> fail_http 404
      | Some b ->
         String.send (b, "application/json") >>=
           (fun x -> return @@ cast_unknown_content_kind x))
1157

1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169
let () =
  Any.register
    ~service:election_tally_trustees
    (fun (uuid, ((), trustee_id)) () ->
      let uuid_s = Uuidm.to_string uuid in
      let w = SMap.find uuid_s !election_table in
      let module W = (val w : WEB_ELECTION) in
      lwt () =
        match_lwt Web_persist.get_election_state uuid_s with
        | `EncryptedTally _ -> return ()
        | _ -> fail_http 404
      in
1170 1171
      lwt pds = Web_persist.get_partial_decryptions uuid_s in
      if List.mem_assoc trustee_id pds then (
1172
        T.generic_page ~title:"Error"
1173 1174 1175 1176 1177
          "Your partial decryption has already been received and checked!"
          () >>= Html5.send
      ) else (
        T.tally_trustees w trustee_id () >>= Html5.send
      ))
1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216

let () =
  Any.register
    ~service:election_tally_trustees_post
    (fun (uuid, ((), trustee_id)) partial_decryption ->
      let uuid_s = Uuidm.to_string uuid in
      lwt () =
        match_lwt Web_persist.get_election_state uuid_s with
        | `EncryptedTally _ -> return ()
        | _ -> forbidden ()
      in
      lwt pds = Web_persist.get_partial_decryptions uuid_s in
      lwt () =
        if List.mem_assoc trustee_id pds then forbidden () else return ()
      in
      lwt () =
        if trustee_id > 0 then return () else fail_http 404
      in
      let w = SMap.find uuid_s !election_table in
      let module W = (val w :